A Specific Feature of Nitrogen Utilization Efficiency in Leaf Photosynthesis in Oryza glaberrima Steud.
スポンサーリンク
概要
- 論文の詳細を見る
Specific characteristics in the photosynthetic response to nitrogen application were compare between Oryza glaberrima Stend. strains introduced from West Africa and O. sativa L. strains including japonica, javanica, indica and japonica-indica types. These plants were grown in solution culture with different nitrogen concentrations. Chlorophyll content in leaf, the maximum quantum yield (Fv / Fm) in photosystem II and total Rubisco activity showed no significant inter-specific difference. However, O. glaberrima strains represented significantly high nitrogen utilization efficiency (CO<SUB>2</SUB> exchange rate / nitrogen content in unit leaf area), high stomatal and mesophyll conductances in leaves with low nitrogen content, and high photosynthetic efficiency per unit Rubisco activity (CO<SUB>2</SUB> exchange rate / total Rubisco activity). These findings suggest that the in vivo activation level of Rubisco is higher in O. glaberrima strains than in O. sativa strains. The high nitrogen utilization efficiency detected here is unique to O. glaberrima, and is considered to be an advantageous genetic character in photosynthesis. The introduction of such a character into O. sativa is regarded as a step toward the genetic improvement of leaf phtosynthetic ability of this species grown in a nitrogen-input saved condition.
- 日本作物学会の論文
日本作物学会 | 論文
- レイメイとキヨニシキの出葉特性に関する二, 三の知見
- 91 冷害実験装置による水稲の冷害再現試験
- 水稲機械移植栽培の作期と生育収量について
- 42 低水温処理が水稲の生育収量ならびに根の機能におよぼす影響 : 3. 不稔発生様相等に現れた苗間の差異
- 機械移植による晩植水稲の生育相 : 第2報 出穂および諸形質への影響